Men's 5000m athletes: a journey to the limit

　　In track and field, the men's 5000m event is like an epic of endurance and perseverance. This is a comprehensive test of athletes' physical fitness, psychological quality and tactical wisdom, and the men's 5000m athletes measure the distance between challenge and breakthrough with their feet.

　　The men's 5000m event has extremely high requirements for athletes' physical performance. In the case of hemoglobin, for example, it is mainly responsible for transporting oxygen and carbon dioxide, and is involved in the regulation of acid-base balance in the body, which is especially critical for endurance athletes. Generally, the normal value of male hemoglobin ranges from 12 g % to 16 g, and athletes are affected by nutrition, exercise load and other factors during the training period. If anemia occurs below normal values, the supply of oxygen and nutrients is insufficient, and the working capacity will decrease; If the Hb value is too high, the number and volume of red blood cells in the blood will also cause problems. There is also a blood urea index, during normal physiological activities, urea production and excretion are balanced, blood urea concentration is relatively stable, and the blood urea concentration is high at rest due to the impact of training on protein metabolism, which is 5.7 - 7mmol/L. The change of blood urea content during exercise is closely related to the amount and intensity of exercise load, and the morning blood urea value can reflect the recovery after exercise and evaluate the functional status of athletes.

　　Scientific training is the key to improving the performance of men's 5000m athletes. For example, in the men's 5000m final of a college games, Xu Zhenwei and Lu Jiawei in the first group led the whole process. Xu Zhenwei sprinted to win the championship in the last half lap, while Lu Jiawei's poor rhythm was eventually overtaken. This highlights the importance of rationally distributing physical strength and mastering the rhythm. The coach will develop a personalized training plan based on the athlete's physical indicators and characteristics, including aerobic endurance training, interval training, etc. aerobic endurance training improves athletes' cardiopulmonary function and lays the foundation for long-distance running; Interval training alternates high-intensity short-term exercise with rest to improve athletes' speed, endurance and recovery.

　　Psychological quality is also indispensable. The 5000m race is long, and athletes will face the dual challenges of physical fatigue and psychological stress. For example, in an important event, athlete Xiao Zhang once felt unbearable pain in his abdominal muscles during the game, but his desire to win made him overcome the difficulties. This strong mental toughness supports athletes to push their physical limits at critical moments.

　　Men's 5000m athletes continue to surpass themselves in challenges, and they run towards higher, faster and stronger goals in the tempering of physical fitness, training and psychology, writing their own glorious chapters.